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2iwr

From Proteopedia

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Gtpase Like Domain Of Centaurin Gamma 1 (Human)

Structural highlights

2iwr is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.5Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

AGAP2_HUMAN GTPase-activating protein (GAP) for ARF1 and ARF5, which also shows strong GTPase activity. Isoform 1 participates in the prevention of neuronal apoptosis by enhancing PI3 kinase activity. It aids the coupling of metabotropic glutamate receptor 1 (GRM1) to cytoplasmic PI3 kinase by interacting with Homer scaffolding proteins, and also seems to mediate anti-apoptotic effects of NGF by activating nuclear PI3 kinase. Isoform 2 does not stimulate PI3 kinase but may protect cells from apoptosis by stimulating Akt. It also regulates the adapter protein 1 (AP-1)-dependent trafficking of proteins in the endosomal system. It seems to be oncogenic. It is overexpressed in cancer cells, prevents apoptosis and promotes cancer cell invasion.^[1] ^[2] ^[3] ^[4]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Centaurins are a family of proteins that contain GTPase-activating protein domains, with the gamma family members containing in addition a GTPase-like domain. Centaurins reside mainly in the nucleus and are known to activate phosphoinositide 3-kinase, a key regulator of cell proliferation, motility and vesicular trafficking. In the present study, using X-ray structural analysis, enzymatic assays and nucleotide-binding studies, we show that, for CENTG1 (centaurin gamma-1) the GTPase-like domain has broader trinucleotide specificity. Alterations within the G4 motif of CENTG1 from the highly conserved NKXD found in typical GTPases to TQDR result in the loss of specificity, a lower affinity for the nucleotides and higher turnover rates. These results indicate that the centaurins could be more accurately classified as NTPases and point to alternative mechanisms of cell signalling control.

The centaurin gamma-1 GTPase-like domain functions as an NTPase.,Soundararajan M, Yang X, Elkins JM, Sobott F, Doyle DA Biochem J. 2007 Feb 1;401(3):679-88. PMID:17037982^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Xia C, Ma W, Stafford LJ, Liu C, Gong L, Martin JF, Liu M. GGAPs, a new family of bifunctional GTP-binding and GTPase-activating proteins. Mol Cell Biol. 2003 Apr;23(7):2476-88. PMID:12640130
↑ Ahn JY, Rong R, Kroll TG, Van Meir EG, Snyder SH, Ye K. PIKE (phosphatidylinositol 3-kinase enhancer)-A GTPase stimulates Akt activity and mediates cellular invasion. J Biol Chem. 2004 Apr 16;279(16):16441-51. Epub 2004 Feb 3. PMID:14761976 doi:http://dx.doi.org/10.1074/jbc.M312175200
↑ Ahn JY, Hu Y, Kroll TG, Allard P, Ye K. PIKE-A is amplified in human cancers and prevents apoptosis by up-regulating Akt. Proc Natl Acad Sci U S A. 2004 May 4;101(18):6993-8. Epub 2004 Apr 26. PMID:15118108 doi:http://dx.doi.org/10.1073/pnas.0400921101
↑ Nie Z, Fei J, Premont RT, Randazzo PA. The Arf GAPs AGAP1 and AGAP2 distinguish between the adaptor protein complexes AP-1 and AP-3. J Cell Sci. 2005 Aug 1;118(Pt 15):3555-66. PMID:16079295 doi:http://dx.doi.org/10.1242/jcs.02486
↑ Soundararajan M, Yang X, Elkins JM, Sobott F, Doyle DA. The centaurin gamma-1 GTPase-like domain functions as an NTPase. Biochem J. 2007 Feb 1;401(3):679-88. PMID:17037982 doi:10.1042/BJ20060555

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2iwr"

@@ Line 3: / Line 3: @@
 <StructureSection load='2iwr' size='340' side='right'caption='[[2iwr]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2iwr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IWR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2IWR FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2iwr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IWR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2IWR FirstGlance]. <br>
-</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CAF:S-DIMETHYLARSINOYL-CYSTEINE'>CAF</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.5&#8491;</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2bmj|2bmj]]</div></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CAF:S-DIMETHYLARSINOYL-CYSTEINE'>CAF</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2iwr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2iwr OCA], [https://pdbe.org/2iwr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2iwr RCSB], [https://www.ebi.ac.uk/pdbsum/2iwr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2iwr ProSAT]</span></td></tr>
 </table>
+== Function ==
+[https://www.uniprot.org/uniprot/AGAP2_HUMAN AGAP2_HUMAN] GTPase-activating protein (GAP) for ARF1 and ARF5, which also shows strong GTPase activity. Isoform 1 participates in the prevention of neuronal apoptosis by enhancing PI3 kinase activity. It aids the coupling of metabotropic glutamate receptor 1 (GRM1) to cytoplasmic PI3 kinase by interacting with Homer scaffolding proteins, and also seems to mediate anti-apoptotic effects of NGF by activating nuclear PI3 kinase. Isoform 2 does not stimulate PI3 kinase but may protect cells from apoptosis by stimulating Akt. It also regulates the adapter protein 1 (AP-1)-dependent trafficking of proteins in the endosomal system. It seems to be oncogenic. It is overexpressed in cancer cells, prevents apoptosis and promotes cancer cell invasion.<ref>PMID:12640130</ref> <ref>PMID:14761976</ref> <ref>PMID:15118108</ref> <ref>PMID:16079295</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 31: / Line 33: @@
 __TOC__
 </StructureSection>
-[[Category: Human]]
+[[Category: Homo sapiens]]
 [[Category: Large Structures]]
-[[Category: Arrowsmith, C]]
+[[Category: Arrowsmith C]]
-[[Category: Doyle, D A]]
+[[Category: Doyle DA]]
-[[Category: Edwards, A]]
+[[Category: Edwards A]]
-[[Category: Elkins, J M]]
+[[Category: Elkins JM]]
-[[Category: Papagrigoriou, E]]
+[[Category: Papagrigoriou E]]
-[[Category: Structural genomic]]
+[[Category: Soundararajan M]]
-[[Category: Soundararajan, M]]
+[[Category: Sundstrom M]]
-[[Category: Sundstrom, M]]
+[[Category: Weigelt J]]
-[[Category: Weigelt, J]]
+[[Category: Yang X]]
-[[Category: Yang, X]]
-[[Category: Alternative splicing]]
-[[Category: Ank repeat]]
-[[Category: Centg1]]
-[[Category: Gtp-binding]]
-[[Category: Gtpase]]
-[[Category: Gtpase activation]]
-[[Category: Hydrolase]]
-[[Category: Metal-binding]]
-[[Category: Nuclear protein]]
-[[Category: Nucleotide-binding]]
-[[Category: Oncogene]]
-[[Category: Phosphorylation]]
-[[Category: Polymorphism]]
-[[Category: Protein transport]]
-[[Category: Sgc]]
-[[Category: Transport]]
-[[Category: Zinc]]
-[[Category: Zinc-finger]]

2iwr

From Proteopedia

Current revision

Gtpase Like Domain Of Centaurin Gamma 1 (Human)

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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